Vim: Add bash template

It's really complex, but should facilitate writing better standalone scripts
Obviously, for one-offs, there's still .sh files

.vim/templates/=template=.bash

@@ -0,0 +1,148 @@
+#! /bin/bash
+#
+# %FILE%
+# Copyright (C) %YEAR% %USER% <%MAIL%>
+#
+# Distributed under terms of the %LICENSE% license.
+#
+set -e
+
+# Read-only set-once variables
+declare -r _name="$(basename -- "$0")"
+# Options
+declare -a _config=(
+	[foo]="bar"
+	[baz]="bop"
+)
+declare _optconfigfile="${XDG_CONFIG_HOME:-$HOME/.config}/${_name}.conf"
+declare -i _opthelp
+declare -i _optverbose
+# Working variables
+declare -a _args
+declare _return
+
+# Helper functions
+log() {
+	# Print a line to the terminal if _optverbose is greater than $2
+	# $2 defaults to 0
+	# loglevel 0: Daily-use messages
+	# loglevel 1: Detailed but not quite debugging
+	# loglevel 2: Definitely debugging
+	[ -z "$1" ] && return 1
+	if (( _optverbose >= ${2:-0} )); then
+		printf "%s\\n" "$1"
+	fi
+}
+warn() {
+	# Print a yellow line to the terminal, respecting _optverbose
+	[ -z "$1" ] && return 1
+	if (( _optverbose >= ${2:-0} )); then
+		if [ -t 1 ]; then
+			printf "\\e[33m%s\\e[0m\\n" "$1"
+		else
+			printf "WARN: %s\\n" "$1"
+		fi
+	fi
+}
+error() {
+	# Print a red line to the terminal, exit if $2 is specified
+	[ -z "$1" ] && return 1
+	if [ -t 2 ]; then
+		printf "\\e[31m%s\\e[0m\\n" "$1" 1>&2
+	else
+		printf "ERROR: %s\\n" "$1" 1>&2
+	fi
+	[ -z "$2" ] && return
+	exit "${2:-1}"
+}
+has() {
+	# Parse out all arguments and try to find them in path
+	# If an argument cannot be found, set _return and fail
+	for prog in "$@"; do
+		if ! command -v "$prog" > /dev/null 2>&1; then
+			_return="$prog"
+			return 1
+		fi
+	done
+	return 0
+}
+
+# Core program functions
+printhelp() {
+	cat << EOF
+Usage: $_name [OPTION]... [FILE]...
+
+  -c [FILE]		Load the given file in place of the usual config file
+  -h			Print this help text
+  -v			Print more status messages. Stacks
+
+Copyright (c) %YEAR% %MAIL%
+Licensed under the %LICENSE% license
+EOF
+}
+
+# Main
+main() {
+	# Parse out arguments
+	while [ -n "$1" ]; do
+		# Parse out flags
+		while getopts ":hv" opt; do
+			case $opt in
+				c)
+					_optconfigfile="$OPTARG"
+					;;
+				h)
+					_opthelp=1
+					;;
+				v)
+					_optverbose+=1
+					;;
+				:)
+					error "Option requires argument: -$OPTARG" 2
+					;;
+				*)
+					error "Invalid option: -$OPTARG" 2
+					;;
+			esac
+		done
+		# Store arguments
+		shift $((OPTIND - 1))
+		if [ -n "$1" ]; then
+			_args+=("$1")
+			shift
+		fi
+		unset OPTIND
+	done
+	# Early hook for help
+	[ -n "$_opthelp" ] && printhelp && exit 0
+	# Parse out a config file if it exists
+	if [ -f "$_optconfigfile" ]; then
+		log "Loading config file" 2
+		while read line; do
+			# If the line has an equals sign and isn't a comment
+			if [ "$line" != "${line#*=}" ] && validateline "$line"; then
+				local key="${line%=*}"
+				local value="${line#*=}"
+				_config[$key]="$value"
+				log "Setting $key to $value" 2
+			fi
+		done < "$_optconfigfile"
+	else
+		warn "Could not find configuration file" 2
+	fi
+	# Validate critical options
+	# TODO: That
+	# Validate core program dependencies
+	log "Validating dependencies" 2
+	if ! has basename; then
+		error "Failed to find program: $_return" 1
+	fi
+
+	# Do the do
+	# TODO: The do
+	warn "Nothing to do"
+	exit 0
+}
+
+main "$@"
+